Return to the stairs and then climb to the platform at the top. Your enemies will throw firebombs towards you to set off the barrels located at the top of the steps, so turn around before the blast goes off and then climb the stairs and kill both of Elden Ring Runes guards before they throw more bombs at you. On this platform you will have a locked door which we aren't allowed to use in the near future, but we can look just to the right of door to find the Throwing Dagger x5.
Make a turn and walk up the next staircase where you are in a room with the Smoldering Butterfly 3.0 and more explosive barrels to avoid. Kill the enemy before you, then smash down the debris behind you for a new set of staircases. Kill the enemy on near the end of the stairs. You can then lower to grab the Golden Rune  on the platform below.
You can go back up the stairs and open the black door that is located on the right side of the upper platform. When you enter this room, you will trigger scenes where the doors is locked behind you, locking you in with the knight's black armor. The knight comes with a massive shield, however his slow movements make him very vulnerable to backstabs. Be wary, however. You can be sure that he'll use their Ashes of War Storm Stop ability to summon the possibility of significant damage if playing a highly armored character.Once the knight has been killed, it's time to go exploring and grab you the Rusty Key and Curved Sword Talisman.
Return to the platform using the locked door. Don't try to use the key just yet. Instead, look for a huge hole in the wall on the left to the right of the doors. Make a jump inside the wall. There you will find Str. Trina's Arrow x10. Target the enemy below and take them down with an attacking fall. Beware of a spear-wielding enemy to your left , who will attack you with firebombs and a third one who will come down to the ladder on from the very top of cheap Elden Ring Items the ladder. Once all the enemies are removed, climb up the ladder and return to the room through the hole in the wall near the top.